diff options
Diffstat (limited to 'doc/src')
| -rw-r--r-- | doc/src/sgml/ref/create_subscription.sgml | 27 |
1 files changed, 17 insertions, 10 deletions
diff --git a/doc/src/sgml/ref/create_subscription.sgml b/doc/src/sgml/ref/create_subscription.sgml index 8a3096e62b5..6cf7d4f9a1a 100644 --- a/doc/src/sgml/ref/create_subscription.sgml +++ b/doc/src/sgml/ref/create_subscription.sgml @@ -271,11 +271,23 @@ CREATE SUBSCRIPTION <replaceable class="parameter">subscription_name</replaceabl <listitem> <para> Specifies whether to enable streaming of in-progress transactions - for this subscription. The default value is <literal>off</literal>, - meaning all transactions are fully decoded on the publisher and only - then sent to the subscriber as a whole. + for this subscription. The default value is <literal>parallel</literal>, + meaning incoming changes are directly applied via one of the parallel + apply workers, if available. If no parallel apply worker is free to + handle streaming transactions then the changes are written to + temporary files and applied after the transaction is committed. Note + that if an error happens in a parallel apply worker, the finish LSN + of the remote transaction might not be reported in the server log. </para> + <caution> + <para> + There is a risk of deadlock when the schemas of the publisher and + subscriber differ, although such cases are rare. The apply worker + is equipped to retry these transactions automatically. + </para> + </caution> + <para> If set to <literal>on</literal>, the incoming changes are written to temporary files and then applied only after the transaction is @@ -283,13 +295,8 @@ CREATE SUBSCRIPTION <replaceable class="parameter">subscription_name</replaceabl </para> <para> - If set to <literal>parallel</literal>, incoming changes are directly - applied via one of the parallel apply workers, if available. If no - parallel apply worker is free to handle streaming transactions then - the changes are written to temporary files and applied after the - transaction is committed. Note that if an error happens in a - parallel apply worker, the finish LSN of the remote transaction - might not be reported in the server log. + If set to <literal>off</literal>, all transactions are fully decoded + on the publisher and only then sent to the subscriber as a whole. </para> </listitem> </varlistentry> |